Abstract
Among many factors that are associated with drought tolerance in legume crops, root traits have been considered to be the most important attributes enabling the plant to mine water efficiently from deeper soil layer under dry environments. Most of the methods used to evaluate roots are time consuming that provide valuable information about the root morphology but they do not reflect the dynamic characteristics of roots and root systems. Considerable amount of genetic variability with respect to root traits involving length, dry weight and root length density (RLD) has been observed. Apart from the observed morphological variation in roots which has specific significance of adaptation, their functional aspects involving direct water uptake and their related kinetics are equally important. A large lysimetric system has been developed at ICRISAT to make progress in this direction. Compared to other legumes, root traits in chickpea have been thoroughly investigated and consequently, preliminary breeding works have been initiated using root traits. Root measurements in plants grown in cylinders showed almost similar relationship with depth and RLD determined in the field and thus have been used to explore diversity for these traits in chickpea. The possible diversity for root traits has been analysed in wild relatives and transgenics as well. Using this method, root depth and RLD are being phenotyped in several recombinant inbred line populations. A major putative quantitative trait loci (QTL) for RLD was identified in a population involving a profuse rooting parent ICC 4958 and the contrasting Annigeri. These QTLs will be a faster and easier replacement technique against time-consuming phenotyping of roots and will be the way forward to introgress superior root characteristics. Efforts are also being made to use wild relatives of Cicer for inheriting some adaptive traits. In chickpea, a preliminary study is being carried out to test the response to drought stress of DREB1A and P5CSF transgenic events using a lysimetric system. The study demonstrated a modest increased in water uptake but not yield under water stress in one transgenic event of DREB1A and one P5CSF event. In groundnut, DREB1A triggers native genes that might be involved in root development. In this review, the progress made so far on roots in legume crops has been elucidated which might explore possibilities of breeding genotypes to inherit efficient root system in legumes.
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Claims 9
Claim · model-written summary
Considerable genetic variability was observed for legume root length, dry weight and root length density.
Verbatim
e0“Considerable amount of genetic variability with respect to root traits involving length, dry weight and root length density (RLD) has been observed.”
t0“Root research for drought tolerance in legumes: Quo vadis?”
Claim · model-written summary
A large lysimetric system was developed at ICRISAT for legume root research.
Verbatim
e0“A large lysimetric system has been developed at ICRISAT to make progress in this direction.”
t0“Root research for drought tolerance in legumes: Quo vadis?”
Claim · model-written summary
Chickpea cylinder root measurements tracked field relationships between depth and root length density.
- Taxon
- chickpea
Cicer arietinume1 - Outcome
- relationship with depth and RLDe0
- Direction
- almost similare0
- Comparator
- in the fielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root measurements in plants grown in cylinders showed almost similar relationship with depth and RLD determined in the field”
e1“In chickpea, a preliminary study is being carried out”
Claim · model-written summary
A major putative QTL for chickpea root length density was identified in the ICC 4958 by Annigeri population.
- Taxon
- chickpeaCicer arietinume1
- Material
- ICC 4958e0
- Gene
- quantitative trait loci (QTL)e0
- Outcome
- RLDe0
- Qualifier
- putativee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A major putative quantitative trait loci (QTL) for RLD was identified in a population involving a profuse rooting parent ICC 4958 and the contrasting Annigeri.”
e1“In chickpea, a preliminary study is being carried out”
Claim · model-written summary
One DREB1A chickpea transgenic event modestly increased water uptake under water stress.
- Taxon
- chickpeaCicer arietinume1
- Treatment
- water stresse0
- Gene
- DREB1Ae0
- Outcome
- water uptakee0
- Direction
- increasede0
- Qualifier
- modeste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The study demonstrated a modest increased in water uptake but not yield under water stress in one transgenic event of DREB1A and one P5CSF event.”
e1“In chickpea, a preliminary study is being carried out”
Claim · model-written summary
One P5CSF chickpea transgenic event modestly increased water uptake under water stress.
- Taxon
- chickpeaCicer arietinume1
- Treatment
- water stresse0
- Gene
- P5CSFe0
- Outcome
- water uptakee0
- Direction
- increasede0
- Qualifier
- modeste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The study demonstrated a modest increased in water uptake but not yield under water stress in one transgenic event of DREB1A and one P5CSF event.”
e1“In chickpea, a preliminary study is being carried out”
Claim · model-written summary
The DREB1A chickpea event did not increase yield under water stress.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The study demonstrated a modest increased in water uptake but not yield under water stress in one transgenic event of DREB1A and one P5CSF event.”
e1“In chickpea, a preliminary study is being carried out”
Claim · model-written summary
The P5CSF chickpea event did not increase yield under water stress.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The study demonstrated a modest increased in water uptake but not yield under water stress in one transgenic event of DREB1A and one P5CSF event.”
e1“In chickpea, a preliminary study is being carried out”
Claim · model-written summary
DREB1A triggers native genes potentially involved in groundnut root development.
- Taxon
- groundnut
Arachis hypogaeae0 - Gene
- DREB1Ae0
- Outcome
- root developmente0
- Qualifier
- might be involvede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In groundnut, DREB1A triggers native genes that might be involved in root development.”
The same questions in other papers
drought · yield · Cicer arietinum (chickpea)Results differ
42 papers in the same direction as this paper · 11 in the opposite direction
- positive
- positive
- positive
50 papers more in this group
See all 54 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.